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Texto reemplazado: «<sup>th</sup> century» por «th century»
Cereals were and continue to be an essential part of the human diet. The ''white''<ref>White land is where cereals are grown. José María IRIBARREN. ''Vocabulario navarro''. Pamplona: 1977, p. 510.</ref> land where cereal and mainly wheat are grown predominate in La Llanada Alavesa, La Rioja Alavesa, Navarra Media and the Ribera del Ebro.
Growing cereals gradually fell into disuse throughout the 20<sup>th</sup> 20th century, with the last to disappear being the most used of all, wheat. Another cereal, corn, which was better adapted to the damp conditions of this part of the territory gained considerably in importance, even though it also has declined in recent decades and is mainly used for animal feed.
=== Pulses and beans, ortuariak ===
Pulses and beans have been eaten since ancient times. They were the first vegetable products to come into use and earlier than cereals.
At least since the 17<sup>th</sup> 17th century, pulses and beans were usually alternated with cereals and had a dual role: to enrich the land in crop rotations and used to feed the livestock and people.
=== Underground vegetables ===